千赫的英文怎么说
千赫的英文: These radio waves are coming at 15000 hertz. Commercial AM stations operate in the frequency range of 535 to 1605 kHz. Echolocation calls are ultrasonic ranging in frequency from 20 to 200 kilohertz. n. 千赫 The stress waves in elastic media have a frequency above 20 kilohertz. Echolocation calls are ultrasonic ranging in frequency from 20 to 200 kilohertz. |